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asp.net building controls : maintain viewstate in listboxes
control, uc1.ascx has a series of list boxes that are populated in series by each other with ONSELECTEDINDEXCHANGED. In the second control, uc2.ascx, lower down on the page, there is an imagebutton. When the imagebutton is clicked, it goes to the same page with a change in url parameter pageID. The control mentioned above sticks around, while the second one is swapped out for another web user control, uc3.ascx. The values populated and selections in the listbox in the uc1.ascx are getting lost despite viewstate being enabled as true. What is going on? The imagebutton looks like this: Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click Response.Redirect("~/advanced/default.aspx?pageID=shas") End Sub -- _____ DC G
[quoted text, click to view]
DC Gringo wrote: > I have an asp.net vb page with two web user controls on it. The > first user control, uc1.ascx has a series of list boxes that are > populated in series by each other with ONSELECTEDINDEXCHANGED. > > In the second control, uc2.ascx, lower down on the page, there is an > imagebutton. When the imagebutton is clicked, it goes to the same > page with a change in url parameter pageID. The control mentioned > above sticks around, while the second one is swapped out for another > web user control, uc3.ascx. > > The values populated and selections in the listbox in the uc1.ascx are > getting lost despite viewstate being enabled as true. > > What is going on? > > The imagebutton looks like this: > > Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e As > System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click > Response.Redirect("~/advanced/default.aspx?pageID=shas") > End Sub Using Response.Redirect causes all viewstate to be lost. With Redirect, you call the page as if it is the first time. I suggest you omit the Response.Redirect, and do the swapping in imgShasTab_Click . -- Jos
Well that certainly makes sense.
Ok, so I tried: Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click shas1.Visible = True Me.Visible = False End Sub This Sub imgShasTab_Click is in the same control as the imagebutton control. The result is that the Me.Visible = False part works, but the shas1.visible part does not. What am I doing wrong? _____ DC G [quoted text, click to view] "Jos" <jnospambranders@fastmail.fm> wrote in message news:u$3DEIKxEHA.2316@TK2MSFTNGP15.phx.gbl... > DC Gringo wrote: > > I have an asp.net vb page with two web user controls on it. The > > first user control, uc1.ascx has a series of list boxes that are > > populated in series by each other with ONSELECTEDINDEXCHANGED. > > > > In the second control, uc2.ascx, lower down on the page, there is an > > imagebutton. When the imagebutton is clicked, it goes to the same > > page with a change in url parameter pageID. The control mentioned > > above sticks around, while the second one is swapped out for another > > web user control, uc3.ascx. > > > > The values populated and selections in the listbox in the uc1.ascx are > > getting lost despite viewstate being enabled as true. > > > > What is going on? > > > > The imagebutton looks like this: > > > > Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e As > > System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click > > Response.Redirect("~/advanced/default.aspx?pageID=shas") > > End Sub > > Using Response.Redirect causes all viewstate to be lost. > With Redirect, you call the page as if it is the first time. > > I suggest you omit the Response.Redirect, and do the swapping in > imgShasTab_Click . > > -- > > Jos > >
Anyone? A little help on this?
_____ DC G [quoted text, click to view] "DC Gringo" <dcgringo@visiontechnology.net> wrote in message news:u8tfluPxEHA.2316@TK2MSFTNGP15.phx.gbl... > Well that certainly makes sense. > > Ok, so I tried: > > Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e As > System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click > > shas1.Visible = True > Me.Visible = False > > End Sub > > This Sub imgShasTab_Click is in the same control as the imagebutton control. > The result is that the Me.Visible = False part works, but the shas1.visible > part does not. > > What am I doing wrong? > > _____ > DC G > > > > "Jos" <jnospambranders@fastmail.fm> wrote in message > news:u$3DEIKxEHA.2316@TK2MSFTNGP15.phx.gbl... > > DC Gringo wrote: > > > I have an asp.net vb page with two web user controls on it. The > > > first user control, uc1.ascx has a series of list boxes that are > > > populated in series by each other with ONSELECTEDINDEXCHANGED. > > > > > > In the second control, uc2.ascx, lower down on the page, there is an > > > imagebutton. When the imagebutton is clicked, it goes to the same > > > page with a change in url parameter pageID. The control mentioned > > > above sticks around, while the second one is swapped out for another > > > web user control, uc3.ascx. > > > > > > The values populated and selections in the listbox in the uc1.ascx are > > > getting lost despite viewstate being enabled as true. > > > > > > What is going on? > > > > > > The imagebutton looks like this: > > > > > > Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e As > > > System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click > > > Response.Redirect("~/advanced/default.aspx?pageID=shas") > > > End Sub > > > > Using Response.Redirect causes all viewstate to be lost. > > With Redirect, you call the page as if it is the first time. > > > > I suggest you omit the Response.Redirect, and do the swapping in > > imgShasTab_Click . > > > > -- > > > > Jos > > > > > >
Can you put some javascript in the onload event to investigate what the
visibility property is at the time the page loads? -- Regards, Alvin Bruney [ASP.NET MVP http://mvp.support.microsoft.com/default.aspx] Got tidbits? Get it here... http://tinyurl.com/27cok [quoted text, click to view] "DC Gringo" <dcgringo@visiontechnology.net> wrote in message news:eaL$lQcxEHA.3896@TK2MSFTNGP10.phx.gbl... > Anyone? A little help on this? > > _____ > DC G > > "DC Gringo" <dcgringo@visiontechnology.net> wrote in message > news:u8tfluPxEHA.2316@TK2MSFTNGP15.phx.gbl... >> Well that certainly makes sense. >> >> Ok, so I tried: >> >> Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e As >> System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click >> >> shas1.Visible = True >> Me.Visible = False >> >> End Sub >> >> This Sub imgShasTab_Click is in the same control as the imagebutton > control. >> The result is that the Me.Visible = False part works, but the > shas1.visible >> part does not. >> >> What am I doing wrong? >> >> _____ >> DC G >> >> >> >> "Jos" <jnospambranders@fastmail.fm> wrote in message >> news:u$3DEIKxEHA.2316@TK2MSFTNGP15.phx.gbl... >> > DC Gringo wrote: >> > > I have an asp.net vb page with two web user controls on it. The >> > > first user control, uc1.ascx has a series of list boxes that are >> > > populated in series by each other with ONSELECTEDINDEXCHANGED. >> > > >> > > In the second control, uc2.ascx, lower down on the page, there is an >> > > imagebutton. When the imagebutton is clicked, it goes to the same >> > > page with a change in url parameter pageID. The control mentioned >> > > above sticks around, while the second one is swapped out for another >> > > web user control, uc3.ascx. >> > > >> > > The values populated and selections in the listbox in the uc1.ascx >> > > are >> > > getting lost despite viewstate being enabled as true. >> > > >> > > What is going on? >> > > >> > > The imagebutton looks like this: >> > > >> > > Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e >> > > As >> > > System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click >> > > Response.Redirect("~/advanced/default.aspx?pageID=shas") >> > > End Sub >> > >> > Using Response.Redirect causes all viewstate to be lost. >> > With Redirect, you call the page as if it is the first time. >> > >> > I suggest you omit the Response.Redirect, and do the swapping in >> > imgShasTab_Click . >> > >> > -- >> > >> > Jos >> > >> > >> >> > >
I'd be happy to, could I get a code sample?
_____ DC G [quoted text, click to view] "Alvin Bruney [MVP]" <vapor at steaming post office> wrote in message news:uxdeTnexEHA.3260@TK2MSFTNGP10.phx.gbl... > Can you put some javascript in the onload event to investigate what the > visibility property is at the time the page loads? > > -- > Regards, > Alvin Bruney > [ASP.NET MVP http://mvp.support.microsoft.com/default.aspx] > Got tidbits? Get it here... http://tinyurl.com/27cok > "DC Gringo" <dcgringo@visiontechnology.net> wrote in message > news:eaL$lQcxEHA.3896@TK2MSFTNGP10.phx.gbl... > > Anyone? A little help on this? > > > > _____ > > DC G > > > > "DC Gringo" <dcgringo@visiontechnology.net> wrote in message > > news:u8tfluPxEHA.2316@TK2MSFTNGP15.phx.gbl... > >> Well that certainly makes sense. > >> > >> Ok, so I tried: > >> > >> Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e As > >> System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click > >> > >> shas1.Visible = True > >> Me.Visible = False > >> > >> End Sub > >> > >> This Sub imgShasTab_Click is in the same control as the imagebutton > > control. > >> The result is that the Me.Visible = False part works, but the > > shas1.visible > >> part does not. > >> > >> What am I doing wrong? > >> > >> _____ > >> DC G > >> > >> > >> > >> "Jos" <jnospambranders@fastmail.fm> wrote in message > >> news:u$3DEIKxEHA.2316@TK2MSFTNGP15.phx.gbl... > >> > DC Gringo wrote: > >> > > I have an asp.net vb page with two web user controls on it. The > >> > > first user control, uc1.ascx has a series of list boxes that are > >> > > populated in series by each other with ONSELECTEDINDEXCHANGED. > >> > > > >> > > In the second control, uc2.ascx, lower down on the page, there is an > >> > > imagebutton. When the imagebutton is clicked, it goes to the same > >> > > page with a change in url parameter pageID. The control mentioned > >> > > above sticks around, while the second one is swapped out for another > >> > > web user control, uc3.ascx. > >> > > > >> > > The values populated and selections in the listbox in the uc1.ascx > >> > > are > >> > > getting lost despite viewstate being enabled as true. > >> > > > >> > > What is going on? > >> > > > >> > > The imagebutton looks like this: > >> > > > >> > > Private Sub imgShasTab_Click(ByVal sender As System.Object, ByVal e > >> > > As > >> > > System.Web.UI.ImageClickEventArgs) Handles imgShasTab.Click > >> > > Response.Redirect("~/advanced/default.aspx?pageID=shas") > >> > > End Sub > >> > > >> > Using Response.Redirect causes all viewstate to be lost. > >> > With Redirect, you call the page as if it is the first time. > >> > > >> > I suggest you omit the Response.Redirect, and do the swapping in > >> > imgShasTab_Click . > >> > > >> > -- > >> > > >> > Jos > >> > > >> > > >> > >> > > > > > >
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